And last week, we reported on lawmakers and their debate whether to have a debate on gun control. After a vote, they will, too. Many are certain the reason why are the mothers and fathers from newtown, who lined the halls of congress with pictures of their children. Abc's reena ninan tonight. Reporter: They are the sweet angelic faces of the newtown victims. Making it uncomfortable for lawmakers to do nothing. Sometimes I close my eyes. And all I can remember is that awful day, waiting at the sandy hookolunteer firehouse for the boy who would never come home. Reporter: Raw. Emotional. And refusing to leave washington. The families of newtown victims finding cted allies. Joe manchin, risking his a-rating from the nra, and putting his name on bipartisan legislation for expanding ground checks, from gun sales by licensed dealers, to gun shows and online purchases. If you would have met with the families, the strongest people I ever met with. They never asked to take anybody's guns away. They never asked to repeal the second amendment. So, yes, I plan on doing something. Reporter: But the background checks, far from a done deal. Lawmakers spent the week debating over whether to have a debate. "Saturday night live" overnight. They've agreed to think about talking about gun control. Reporter: Critical of how little lawmakers have done. There's no individual can purchase a handgun from private dealer without being asked, are you a good person? Seriously. Are you? Reporter: After a week of debating over whether to debate, the senate could begin voting on parts of the bill as early as wednesday. But even democrats admit, it's far from a done deal.

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Newtown Mother Shares Personal Grief on Political Stage

School shooting victim's mother urges stronger gun control in President Obama's weekly address.